消化道出血是常见疾病,其中约有5%的消化道出血生在小肠,诊断比较困难,由于过去小肠是盲区,故这部小肠出血又称为隐源性出血(OGIB)。2000年美国消化镜协会对隐源性出血定义为:经过包括胃镜、结肠镜在内检查手段检查仍不明起源的持续或反复消化道出血。隐源性出血可分为隐蔽出血 Gastrointestinal bleeding is a common disease, of which about 5% of gastrointestinal bleeding in the small intestine, the diagnosis is more difficult, because past the small intestine is a blind spot, so this small intestinal bleeding, also known as cryptogenic hemorrhage (OGIB). In 2000, the American Society for Digestive Microscopy defined cryptogenic hemorrhage as continuous or recurrent gastrointestinal bleeding that still remains unknown after a series of tests including endoscopy and colonoscopy. Cryptic bleeding can be divided into covert bleeding